The invention discloses a blockboard reorganized from artificial board trimmings and a production method of the blockboard, and relates to the technical field of artificial board manufacturing. The blockboard comprises a surface-layer board (1), a first core-layer board (2), a lignin core board (3), a second core-layer board (4), a bottom-layer board (5), transverse strip trimmings (6) and longitudinal strip trimmings (7), wherein the surface-layer board (1), the first core-layer board (2), the lignin core board (3), the second core-layer board (4) and the bottom-layer board (5) are sequentially connected with one another from top to bottom; and the lignin core board (3) is combined from the transverse strip trimmings (6) and the longitudinal strip trimmings (7). The blockboard disclosed by the invention has the advantages that a lot of waste artificial board trimmings are utilized, and thus the wood utilization ratio can be improved by 3-4%; after being reorganized, the blockboard is high in surface quality and flatness; after sanding, the waviness and the warpage of the blockboard are smaller than or equal to 0.3 mm and 0.2% respectively; and the cost of the blockboard disclosed by the invention is relatively low and accounts for about 50% of that of a common blockboard.